I would recommend checking out a BP classified site like Kingsnake.com to see if any BP breeders have any up for sale to get an idea of what they are going for these days.
"We are artists using locus and alleles as our paint; the ball python as our canvas" - Colin Weaver
Since we specifically don't allow sales discussions on the main site then I would take his advice and check fauna and kingsnake.
Since you just announced you have one for sale then as soon as you started discussing prices it'd probably get infracted anyway.
dr del
Derek
7 adult Royals (2.5), 1.0 COS Pastel, 1.0 Enchi, 1.1 Lesser platty Royal python, 1.1 Black pastel Royal python, 0.1 Blue eyed leucistic ( Super lesser), 0.1 Piebald Royal python, 1.0 Sinaloan milk snake 1.0 crested gecko and 1 bad case of ETS. no wife, no surprise.